Size effect criteria on the small punch test for AISI 316L austenitic stainless steel
Size effect criteria on the small punch test for AISI 316L austenitic stainless steel
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DOI：
10.1016/j.msea.2014.03.098
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发表时间：
2014-06
期刊：
影响因子：
6.4
通讯作者：
Ming Song;K. Guan;W. Qin;J. Szpunar;J. Chen
中科院分区：
文献类型：
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作者：
Ming Song;K. Guan;W. Qin;J. Szpunar;J. Chen
近年来，微型试件试验技术已被广泛研究，用于量化体积大大减小的块体材料的性能。采用小冲孔试验(SPT)研究了25个结晶织构基本相同的316L奥氏体不锈钢试件的厚度、晶粒度和厚度与晶粒度比(TGR)对其力学性能的影响。测量了有效的SPT屈服和最大载荷，并与常规拉伸试验的屈服和极限强度进行了关联。结果表明，SPT不仅对晶粒度敏感，而且对厚度和TGR也很敏感。SPT与标准尺寸样品之间存在尺寸效应。为工程应用提供了SPT的尺寸效应判据。此外，还提供了这些尺寸效应的潜在机制。
The miniature specimen test technique has been extensively studied for quantifying the properties of bulk materials with greatly reduced volume recently. In this paper small punch test (SPT) is used to evaluate effects of specimen thickness, grain size and thickness-to-grain size ratio (TGR) on mechanical properties of 25 samples of type 316L austenitic stainless steel with nearly the same crystallographic texture. Effective SPT yield and maximum loads were measured and correlated with yield and ultimate strengths of conventional tensile test. The results show that SPT is sensitive not only to grain size, but also to thickness and TGR. Size effects exist between SPT and standard-sized samples. The present work gives a size effect criterion of SPT for engineering application. In addition, the underlying mechanisms of these size effects are provided.